Heat exchanger core shield



M y 1940- F. M YOUNG I HEAT EXCHANGER CORE SHIELD Filed April 14, 1938 Fig.1]

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'INVEN'TOR FRwMYouA/q Y aid g TTORNE Patented May 14, 1940 UNITED STATES PATENT OFFICE HEAT EXCHANGER CORE SHIELD Fred M. Young, Racine, Wis. Application April 14, 1938, Serial No. 201,859

2 Claims.

The present invention relates to heat exchanger cores having a number of tubes and a multiplicity of fins of a type wherein it is desirable to protect their ends and corners from injury.

a Modern core fins are very thin and fragile, and are easily bent out of position. Therefore, it is desirable to shield their corners and ends.

An object of the present invention is to provide a shield which is light, simple, easily manufactured and easily assembled on the core.

A further object of the present invention is to provide a shield which will improve the appearance of the core at a nominal cost and adequately protect the core.

15 To these and other useful ends my invention consists of parts, combinations of parts or their equivalents as hereinafter described and claimed, and shown in the accompanying drawing in- Fig. 4 is a fractional view of a modification.

Fig. 5 is a plan view of a fraction of my improved device.

an Fig. 6 is a plan view of the other fraction of the device as used to complete the shield for one side of the core.

As thus illustrated, numeral l designates the tubes of the core, numeral ll designates the fins 35 of the core through which the tubes extend as illustrated. It is customary to flange the openings in the fins (not shown) forming a means foradequately bonding the fins to the tubes.

Various kinds of headers are used on cores of the class. I illustrate, forconvenience, headers which are adapted for use on sectional heat exchangers. These headers are designated by numerals l2 and I3 each having two openings for the reception of holding bolts and outlet and in- 45 let ports. Thus I have/shown a complete core section designed for a specific purpose. when the cores are intended for other purposes, different types of headers are used. The headers shown are therefore not involved in this inven- 50 tion. r

I provide cut-away portions 20 in theside edges of the fins and near the ends thereof, thus channels are formed for the length of the':, core. I provide L-shaped members 25 on which are is formed flanges 26. Members 25 are held in pairs in the position shown in Figures 1, 2 and 3 by means of strips 21-21. These strips are preferably spot welded to one of the members 25 as at 28 as illustrated in Figure and after the pair has been assembled on the core, and held tightly 5 into position,-the other ends of members 21 are bonded to the other member 25 as at 28.

In Figure 4 I illustrate a modification wherein the fins 29 are cut-away as 'at 36 and members 3| are formed as at 32 so as to fit into members 10 30 as illustrated. Members 3| are secured to the core as already explained in connection with Figures 5 and 6. v

In Figure 4 depressions 30 may be made somewhat wider than required whereby when the two halves of the shields are pressed together plates 27 or the shields will be drawn tightly against the ends of the fins.

One of the advantages of my device is that the shields consist primarily of two parts which are. secured together after they are assembled on the core, thus before they are secured together; pressure may be used to cause them to tightly hug the faces of the core.

It will be understood that I may elect to position strips 21 on the outside of members 25 and 3| (see Figure 4) thus the shields will contact the ends of the fins instead of plates 21.

It will be understood that I may elect to spot weld one only of members 21 to each of memhers 25, however, it appears desirable to assemble the members as illustrated in Figure 5 making it more convenient to solder or otherwise secure the assembly on the core.- Y

It will also be understood that members 25 may be heldtogether in some other manner than by means of members 21. Cut-away portions 20 and 30 may be formed into the fins without removing material. Clearly many other minor detail changes may be .made without departing .40 from the spirit and scope of the present invention as recited in the appended claims.

Having thus shown and described my invention,

I claim:

. 1. A device of the class described, comprising a number of tubes and a multiplicity of closely spaced rectangular in shape fins through which said tubes extend forming a core, depressions cut in theopposite long edges of said fins near the corners thereof forming channels in the core, unequalfiange angle bars positioned over the corners 'of said core, the narrow flanges having inturned edges adapted to fit into the adjacent channels, "means between adjacent angle irons adapted to firmly hold said flanges in said channels.

2. A device of the class described, comprising a number of tubes and a multiplicity of closely' spaced rectangular in shape fins through which said tubes extend forming a, core, said fins having depressions in their opposite long edges near the 

